China Photochromic Blue Company – Photochromic Bifocal Lens – YOLI
China Photochromic Blue Company – Photochromic Bifocal Lens – YOLI Detail:
Presbyopia
When people aging 40 or so, our eyes become less flexible. It becomes difficult for us to adjust between distant objects and close objects, as in between driving and reading tasks. And this eye problem is called presbyopia.
Photochromic Bifocal Lens
Single vision lenses are used to sharpen your focus for either nearby or faraway images. However, they cannot be used to sharpen your vision for both. Bifocal lenses enhance your vision for both nearby and faraway images.
Bifocal lenses consists of two prescriptions. A small portion in the lower part of the lens contains the power to correct your near vision. The rest of the lens usually is for your distance vision.
The photochromic bifocal lenses go darken as sunglass when you go outdoors. They protect your eyes from bright light and UV rays, allowing you to read and view clearly at the same time. Lenses will become clear again indoors within only a couple of minutes. You can easily enjoying indoor activities without taking them off.
Available Types of Photochromic Bifocal Lenses
As you have known bifocals have two prescriptions in one piece of lens, the near prescription portion is called “Segment”. There are three types of bifocals based on shape of the segment.
Photochromic flat-top bifocal lens is also called as photochromic D-seg or straight-top. it has a visible “line” and it’s biggest advantage is it offers two very distinct powers. The line is obvious because the change in powers is immediate. With the advantage, it gives you the widest reading area without having to look too far down the lens.
The line in photochromic round top is not as obvious as that in the photochromic flat top. When worn, it tends to be much less noticeable. It functions the same as the photochromic flat top, but the patient must look farther down in the lens to get the same width due to the shape of the lens.
Photochromic blended is a round top design where the lines have been made less visible by blending the different zones between the two powers. The advantage is cosmetic but it does create some visual distortions.
Product detail pictures:
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Assume full duty to satisfy all demands of our clients; reach steady advancements by marketing the development of our purchasers; grow to be the final permanent cooperative partner of clientele and maximize the interests of customers for China Photochromic Blue Company – Photochromic Bifocal Lens – YOLI , The product will supply to all over the world, such as: Karachi, Russia, Mongolia, Many years of work experience, we have realized the importance of providing good quality products and the best before-sales and after-sales services. Most problems between suppliers and clients are due to poor communication. Culturally, suppliers can be reluctant to question things they do not understand. We break down those barriers to ensure you get what you want to the level you expect, when you want it. faster delivery time and the product you want is our Criterion .
By Miranda from Japan - 2017.08.16 13:39
The factory workers have a good team spirit, so we received high quality products fast, in addition, the price is also appropriate, this is a very good and reliable Chinese manufacturers.
By Caroline from Sierra Leone - 2018.09.29 13:24
